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From "Zoltan Haindrich (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-17344) LocalCache element memory usage is not calculated properly.
Date Thu, 17 Aug 2017 11:35:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-17344?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16130285#comment-16130285
] 

Zoltan Haindrich commented on HIVE-17344:
-----------------------------------------

+1 pending tests

> LocalCache element memory usage is not calculated properly.
> -----------------------------------------------------------
>
>                 Key: HIVE-17344
>                 URL: https://issues.apache.org/jira/browse/HIVE-17344
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Janos Gub
>            Assignee: Janos Gub
>         Attachments: HIVE-17344.patch
>
>
> Orc footer cache has a calculation of memory usage:
> {code:java}
> public int getMemoryUsage() {
>   return bb.remaining() + 100; // 100 is for 2 longs, BB and java overheads (semi-arbitrary).
> }
> {code}
> ByteBuffer.remaining returns the remaining space in the bytebuffer, thus allowing this
cache to grow until MAXWEIGHT/100. I think the correct solution would be bb.capacity.



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